A Melbourne milk bar owner has displayed a racist sign banning all black teenagers from the store.

A picture of the vile notice emerged on social media on Friday after it was placed on a shop window in Melton in Melbourne's west.

'Statement,' the sign read. 'Because the 14-18 year old black always steal. Prohibit 14-18 year-old blacks and dogs into the shop (sic).'

A Melbourne milk bar owner has displayed a vile racist sign banning all black teenagers from the store

The sign has sent social media into a frenzy with users labelling it a 'hate crime' and 'disgusting'.

Others argued it was perfectly reasonable to display the notice and pledged to support the business in the future.

Another social media user took a more light-hearted approach: '(There) wouldn't be too many dogs that make it to 18,' they wrote.

Victoria Police said it was aware of the sign.